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Rheological and Flocculated Properties of Silver Nanoparticles Paste

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Abstract:

Silver nanoparticles pastes were formatted by mixing different volumetric silver nanoparticles with the mixture of 12.7wt% bismuth subgallate and 87.3wt% organic vehicle. Rheological and flocculated properties of silver nanoparticles pastes were examined. All pastes demonstrated pseudoplastic flow behaviors and shear thinning characters over the solids-loading and shear-rate range studied. The viscosities of pastes reduce with increasing the shear rate in a logarithmic plot. G' (storage modulus) and G" (loss modulus) increase with increasing silver nanoparticles content and frequency. At high loading, G' and G" begin to level off and exhibit plateau in the low-frequency range. The appearance of the plateau at low frequency is due to the presence of silver nanoparticles in the system and forming the three-dimensional network structure. The shear stress increases with increasing silver nanoparticles content. Apparent yield value estimated by casson equation exhibits a power-law dependence on particle volume fraction.

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Periodical:

Advanced Materials Research (Volumes 236-238)

Pages:

2197-2201

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.236-238.2197

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Online since:

May 2011

Authors:

Yu Yang Zhang, Shi Xing Wang

Keywords:

Flocculation, Nanopartilces Paste, Rheology

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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